Emerson VE4001S2T2B2

Product Name:​ DeltaV M-series Traditional I/O — 8-Channel Discrete Input (DI) Card, 24 V DC Dry Contact, Isolated
Product Overview:​ The VE4001S2T2B2 is a digital input card that senses the on/off state of field dry-contact devices (limit switches, pushbuttons, relay contacts) and reports their status to the DeltaV controller. It is an 8-channel isolated card with a fused I/O termination block.
Category:
Description
Technical Specifications:
Parameter
Specification
Channels
8 isolated discrete input channels
Input Type
24 V DC dry contact
Input Voltage Range
18–32 V DC
Channel-to-Bus Isolation
1500 V RMS
Input Response Time
Typical < 5 ms
Power Consumption
Max 4 W
Communication
Redundant DeltaV I/O bus
Dimensions (H×W×D)
107 × 41 × 105 mm
Weight
0.249 kg
Operating Temperature
–20 °C to +60 °C (some verified sources state –40 °C to +70 °C)
Storage Temperature
–40 °C to +85 °C
Relative Humidity
5–95% non-condensing
Certifications
CE, UL, CSA, ATEX Zone 2
Hot-Swap
Supported
Functional Features:
  • Channel-level isolation​ protects the controller from field-side voltage transients.
  • Per-channel status LED​ for immediate visual indication of input state.
  • Fused termination block​ provides over-current protection on the field side.
  • Fast response​ (< 5 ms) suitable for sequence-of-event (SOE) capture when configured.
  • Redundant I/O bus​ communication ensures no single point of communication failure.
Application Scenarios:
  • Capturing pump, valve, and motor real-time status in chemical, pharmaceutical, and food-processing plants.
  • Monitoring limit-switch and proximity-sensor feedback.
  • Collecting emergency-shutdown (ESD) and alarm contact states.
  • Interfacing relay and contactor auxiliary contacts to the DeltaV controller.
Installation Requirements:
  • Mount on a standard DeltaV M-series I/O carrier.
  • Pair with the designated fused I/O termination block (KJ4001X1-CB1).
  • Ensure 24 V DC field power is available to the termination block.
  • Verify wiring polarity and contact ratings before energizing.
  • ESD-safe handling required.
Usage Notes:
  • The dry-contact input requires an external 24 V DC source at the termination block to sense contact closure.
  • When replacing the card, configuration is automatically downloaded from the controller — no manual DIP switch setting is needed.
  • For high-speed SOE applications, enable time-stamping in DeltaV configuration and ensure controller time synchronization.
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